Extraction & Elecetrolysis Flashcards
What is Titanium extraction?
done by using the kroll process (magnesium reduction), expensive due to the large amounts of energy needed to create the high temperatures involved.
Produced in batch process
Titanium is extracted from its ore, rutile - TiO2. It is first converted into titanium chloride, which is then reduced to titanium using either magnesium or sodium.
Extraction of Aluminium?
Aluminium ore is called bauxite. The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted. The extraction is done by electrolysis.
Why would Aluminium be chosen over Titanium?
Becasue of the cost, Aluminium is cheaper.
Aluminum is 33% lighter and has a higher tensile strength, strength-to-weight, and stiffness-to-weight.
why is Titanium better than Aluminium?
It is more dense and stronger.
A much smaller volume of titanium is needed to produce a frame of similar strength to the Aluminium.
Define Aluminium?
durable, strong, lightweight and cheap
Equation for the reaction of chloride ions at the anode?
2CL- -> Cl2 +2e-
What charge is the Cathode?
Negative
What charge is the anode?
Positive
Diaphragm cell process?
Chloride ions are oxidized at the anode to produce chlorine, and at the cathode, water is split into caustic soda and hydrogen. The diaphragm prevents the reaction of the caustic soda with the chlorine. A diluted caustic brine leaves the cell.
Membrane cell?
Used to prevent the reaction between the chlorine and hydroxide ions.
What cell is better diaphragm or membrane?
Membrane. Despite it being more expensive, it requires less maintenance and provides a greater purity of sodium hydroxide and is environmentally friendly.
What products only discharge?
chloride
bromide
iodine
What does amphoteric mean?
Acts as an acid or a base
What products are produced between an acid and a metal?
salt and hydrogen
What products are produced between an acid + base reaction?
Salt and Water
